feat(notes): liens internes, onglet Réseau, living blocks et consentement IA

Rend les liens entre notes visibles et persistants (sync NoteLink au save, auto-save, graphe réseau rafraîchi), ajoute living blocks, Memory Echo, recherche globale, consentement IA explicite et consolide les prototypes design en architectural-grid.

Co-authored-by: Cursor <cursoragent@cursor.com>

memento-note/components/personas-panel.tsx

@@ -8,6 +8,7 @@ import {
 } from 'lucide-react'
 import { cn } from '@/lib/utils'
 import { MarkdownContent } from '@/components/markdown-content'
+import { useAiConsent } from '@/components/legal/ai-consent-provider'
 
 // ── Personas definition ──────────────────────────────────────────────────────
 
@@ -85,6 +86,7 @@ interface PersonasPanelProps {
 // ── Component ─────────────────────────────────────────────────────────────────
 
 export function PersonasPanel({ noteTitle, noteContent }: PersonasPanelProps) {
+  const { requestAiConsent } = useAiConsent()
   const [loadingId, setLoadingId] = useState<PersonaId | null>(null)
   const [results, setResults] = useState<Map<PersonaId, PersonaResult>>(new Map())
   const [expanded, setExpanded] = useState<PersonaId | null>(null)
@@ -111,6 +113,9 @@ export function PersonasPanel({ noteTitle, noteContent }: PersonasPanelProps) {
 
     setLoadingId(personaId)
     try {
+      const consented = await requestAiConsent()
+      if (!consented) return
+
       const res = await fetch('/api/ai/personas', {
         method: 'POST',
         headers: { 'Content-Type': 'application/json' },